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The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation
Designing intricate structures and searching for functional materials has attracted wide interest in nanoscience. Herein we have fabricated (NiFe)S(2) pyrite mesocrystals in the form of nearly-single crystalline porous cubes, and studied their self-optimization to realize efficient activity toward w...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Royal Society of Chemistry
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5914147/ https://www.ncbi.nlm.nih.gov/pubmed/29732061 http://dx.doi.org/10.1039/c7sc05452a |
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author | Ni, Bing He, Ting Wang, Jia-ou Zhang, Simin Ouyang, Chen Long, Yong Zhuang, Jing Wang, Xun |
author_facet | Ni, Bing He, Ting Wang, Jia-ou Zhang, Simin Ouyang, Chen Long, Yong Zhuang, Jing Wang, Xun |
author_sort | Ni, Bing |
collection | PubMed |
description | Designing intricate structures and searching for functional materials has attracted wide interest in nanoscience. Herein we have fabricated (NiFe)S(2) pyrite mesocrystals in the form of nearly-single crystalline porous cubes, and studied their self-optimization to realize efficient activity toward water oxidation under electrochemical conditions. The growth mechanism of the mesocrystals was a non-classical mechanism, which was initiated by the formation of a large quantity of small nickel sulfide clusters, followed by the aggregation and transformation of these small clusters in an oriented manner. When these mesocrystals were tested for water oxidation under electrocatalytic conditions, the materials served as pre-catalysts and immediately self-optimized to form amorphous S-doped metal (oxy)hydroxides, which are the real catalytically active materials. As a result, the observed overpotential to reach a current density of 10 mA cm(–2) on glassy carbon electrodes was less than 260 mV. The growth mechanism studied here may provide opportunities for constructing intricate sulfide structures, and the self-optimization process during water oxidation can inspire new thoughts on electrocatalysis. |
format | Online Article Text |
id | pubmed-5914147 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-59141472018-05-04 The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation Ni, Bing He, Ting Wang, Jia-ou Zhang, Simin Ouyang, Chen Long, Yong Zhuang, Jing Wang, Xun Chem Sci Chemistry Designing intricate structures and searching for functional materials has attracted wide interest in nanoscience. Herein we have fabricated (NiFe)S(2) pyrite mesocrystals in the form of nearly-single crystalline porous cubes, and studied their self-optimization to realize efficient activity toward water oxidation under electrochemical conditions. The growth mechanism of the mesocrystals was a non-classical mechanism, which was initiated by the formation of a large quantity of small nickel sulfide clusters, followed by the aggregation and transformation of these small clusters in an oriented manner. When these mesocrystals were tested for water oxidation under electrocatalytic conditions, the materials served as pre-catalysts and immediately self-optimized to form amorphous S-doped metal (oxy)hydroxides, which are the real catalytically active materials. As a result, the observed overpotential to reach a current density of 10 mA cm(–2) on glassy carbon electrodes was less than 260 mV. The growth mechanism studied here may provide opportunities for constructing intricate sulfide structures, and the self-optimization process during water oxidation can inspire new thoughts on electrocatalysis. Royal Society of Chemistry 2018-02-01 /pmc/articles/PMC5914147/ /pubmed/29732061 http://dx.doi.org/10.1039/c7sc05452a Text en This journal is © The Royal Society of Chemistry 2018 http://creativecommons.org/licenses/by/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0) |
spellingShingle | Chemistry Ni, Bing He, Ting Wang, Jia-ou Zhang, Simin Ouyang, Chen Long, Yong Zhuang, Jing Wang, Xun The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation |
title | The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation
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title_full | The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation
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title_fullStr | The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation
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title_full_unstemmed | The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation
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title_short | The formation of (NiFe)S(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation
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title_sort | formation of (nife)s(2) pyrite mesocrystals as efficient pre-catalysts for water oxidation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5914147/ https://www.ncbi.nlm.nih.gov/pubmed/29732061 http://dx.doi.org/10.1039/c7sc05452a |
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